At La Nation Du WebWe help companies take control of their digital performance. As a Paris-based web agency, we support our clients – TPE, SMEs and major accounts – in managing their analysis and monitoring tools. And one of the most powerful of them is unquestionably Google Tag Manager (GTM).
In this guide, our team explains how to fully exploit Google Tag Manager to simplify the management of your tags (tags), improve conversion tracking and optimize your marketing campaigns. Whether you are a beginner or an advanced user, you will learn how to use GTM effectively and strategically.
Google Tag Manager, what is it?
Google Tag Manager (GTM) is a free tool developed by Google that allows to easily add, edit and manage tracking tags (tags) on your website without manually changing the code. This is an essential solution for monitoring visitor behaviour, analyzing conversions, measuring traffic, or integrating services such as:
- Google Analytics
- Google Ads
- Facebook Pixel
- Hotjar, HubSpot, LinkedIn, etc.
Why use GTM?
With GTM, you centralize the management of your tags via an intuitive interface. You save time, reduce mistakes and can deploy beacons independently, without depending on your development team.
Google Tag Manager vs manual tags
Traditionally, each tag had to be inserted into the source code of each page – a time-consuming method, a source of errors and not flexible.
👉 With GTM, you only add one only container to your site, which gathers all your tags. You can then manage them from the interface without touching the site code. Simple, fast, powerful.
When to use Google Tag Manager?
Whether you run a showcase site, e-commerce site or a more complex platform, GTM adapts to all types of projects. It is particularly useful if you:
- Work with multiple tracking tools
- Want to optimize your marketing campaigns
- Collaborate between marketing and technical teams
- Search for total control over your tags
Setting up Google Tag Manager
Step 1: Create a GTM account
See you on tagmanager.google.com
Click « Create an account », inform your company, your country and create a container for your website or mobile app.
An account can manage multiple containers, each corresponding to a different site or app.
Step 2: Install code on your site
After creating your container, GTM provides you with two extracts of code to be integrated:
- The first, just after the tag
<head>on all your pages - The second, immediately after opening the tag
<body>
💡 If you do not have access to your site code, send these snippets to your developer or web agency.
Step 3: Add your first tags
From the GTM interface:
- Click « New tag »
- Choose a preconfigured model (Google Analytics, Ads, Facebook, etc.)
- Define a trigger (e.g. when a page loads, a button is clicked, a form is sent)
- Save and Publish
You can also create custom tags or inject JavaScript code if necessary.
Manage users and permissions
GTM enables smooth collaboration through role management:
- Administrator : complete management of parameters and users
- Publisher : can create and modify tags
- Approbator : valid or refuses changes before publication
- Player : consultation only
At La Nation Du Web, we recommend that roles be clearly defined from the start to avoid errors in deployments.
Advanced features of Google Tag Manager
Organization of beacons
- Sort your tags by name, type, date
- Archive or restore old versions
- Organize tags by categories or objectives (event tracking, conversions, remarketing...)
Workspaces and test environments
- Use work spaces to work for many without conflict
- Create Test environments to validate your tags before starting production
- Test in real time with the Preview mode and debugging
Easy integrations with your analytics tools
GTM simplifies integration with:
- Google Analytics 4 (personalized events, conversions)
- Google Ads (conversion tags, remarketing)
- Facebook Pixel
- And all your marketing or CRM tools thanks to dataLayer
💡 The dataLayer is a data layer that allows you to dynamically switch information (such as a transaction amount or product category) to your tags.
Follow conversions and events
With GTM, you can track key actions on your website :
- Forms submitted
- Clicks on buttons or links
- File Downloads
- Add to cart / Purchases
This data allows you to accurately measure the performance of your campaigns and optimize your conversion tunnel.
Version Management and Publication
GTM records each change as a version. You can:
- See who changed what
- Restore an earlier version
- Compare two versions
- Name and archive your versions
You thus keep a complete traceability all your changes.
Why entrust Google Tag Manager management to an agency?
Mastering GTM requires a good understanding of data, digital marketing, and sometimes code. Poor configuration can distort your analysis, slow down your site, or even compromise your GDPR compliance.
At La Nation Du Web, we accompany you in :
✅ Installation and configuration of GTM
✅ The setting of tags (GA4, Ads, Pixels...)
✅ Monitoring events and conversions
✅ Audit of your data
✅ Training your teams
Boost your performance with GTM and The Web Nation
Google Tag Manager is an essential solution for any company wishing optimize the tracking of its website without technical complexity. Thanks to its flexibility, compatibility with most marketing tools and intuitive management, it becomes a powerful lever to drive your digital performance.
🚀 Would you like to be accompanied in setting up Google Tag Manager?
📞 Contact the Web Nation Team for a custom audit or integration of your conversion tags.
👉 Make an appointment or write to us today!
